fluorine-18
Sign in to saveAlso known as 18F, F-18
Fluorine-18 (18F, also called radiofluorine) is a fluorine radioisotope which is an important source of positrons. Its half-life is 109.734 minutes, less than two hours, and one of the shortest of radioisotopes with use outside research. It decays by positron emission 96.7% of the time and electron capture 3.3% of the time. Both modes of decay yield stable oxygen-18.
Key facts
- Isotope.image
- Fluorine-18 decay.svg
- Isotope.image_caption
- Decay over 24 hours
- Isotope.alternate_names
- Fluorine-18
- Isotope.mass_number
- 18
- Isotope.symbol
- F
- Isotope.num_neutrons
- 9
- Isotope.num_protons
- 9
- Isotope.abundance
- Radioisotope
- Isotope.decay_mode1
- Positron emission (97%)
- Isotope.decay_energy1
- 0.6335
- Isotope.decay_mode2
- Electron capture (3%)
- Isotope.decay_energy2
- 1.6555
- Isotope.decay_product
- Oxygen-18
- Isotope.decay_symbol
- O
- Isotope.decay_mass
- 18
- Isotope.mass
- 18.0009380
- Isotope.spin
- 1+
via Wikipedia infobox
Wikidata facts
- Instance of
- isotope of fluorine
- Subclass of
- fluorine
- Mass
- 18.000937325
- Image
- Fluorine-18.svg
Show 10 more facts
- decays to
- oxygen-18
- atomic number
- 9
- neutron number
- 9
- half-life
- 109.77
- spin quantum number
- 1.0
- parity quantum number
- 1
- canonical SMILES
- [F]
- isomeric SMILES
- [18F]
- mass excess
- 873.113
- binding energy
- 137369.484
Sources (8)
via Wikidata · CC0
~3 min read
Encyclopedic overview
6 sectionsContents
- Natural occurrence
- Synthesis
- History
- Chemistry
- Applications
- References
Fluorine-18 (18F, also called radiofluorine) is a fluorine radioisotope which is an important source of positrons. Its half-life is 109.734 minutes, less than two hours, and one of the shortest of radioisotopes with use outside research. It decays by positron emission 96.7% of the time and electron capture 3.3% of the time. Both modes of decay yield stable oxygen-18.
== Natural occurrence == is a cosmogenic trace radioisotope produced by spallation of atmospheric argon or by reaction of protons with oxygen-18 in the air: 18O + p → 18F + n.
Excerpted from Wikipedia’s “fluorine-18” article, available under the CC BY-SA 4.0 licence.